Brand: Canton Racing Products
This screen element can be installed in a Canton 6 Inch Remote Mount Filter (Part No. 1281-002, sold separately) to filter the suction side of a dry sump system. The medium-fine 80 mesh offers good flow, but it only catches relatively large particles (down to 180 microns)*. It is not for use as a primary filter.
* Particles measuring 180 microns are easily visible to the naked eye. 180 microns is about 0.0075" -- about twice the size of a grain of salt, and more than three times the bearing clearance many engine builders recommend. Your crankshaft was probably polished using an abrasive belt with 23 micron particles.